The U.S. Navy awarded Raytheon Co. a $26.1 million contract for work on integrated shipboard electronic systems aboard San Antonio-class amphibious transport dock ships.

The Pentagon announced the contract on Dec. 18.

The deal includes options that could bring the contract amount to $132.1 million. Raytheon’s Integrated Defense Systems unit will provide life cycle engineering and support services for the electronics. Some 90 percent of the work will be done in San Diego, and work is expected to last through December 2019.

The Naval Sea Systems Command of Washington, D.C. awarded the deal.

Amphibious transport docks carry U.S. Marines and their vehicles. The Navy has taken delivery of nine San Antonio-class ships since 2005, and a 10th ship was launched in October. The class includes the USS San Diego, which makes its home at Naval Base San Diego.